Acacia.] xlvii. § mimosejs (oljver). 343 



Nile Land. Abyssinia, Schimper ! Southern Nubia, Schweinfurth. H or Tarn a- 

 nib, Red Sea, J. K. Lord ! 



Nearly allied to A. Verek, from which the different proportion in length of spike and 

 leaf, and the narrower fruit distinguish it. 



10. A. purpurea, Bolle in Peters' Mossamb. Bot. i. 6. A small tree 

 with green-grey tomentose or thickly pubescent extremities. Leaf- 

 rachis clothed with yellowish pubescence, bearing concave sessile 

 glands between the pinnae, which are in 8 pairs ; leaflets 12-jugate, 

 very shortly petiolulate, oblong, obtuse, thinly pilose, 3 lines long, lj- 

 lines broad. Spikes equalling the leaves, dense, pilose. Flowers 

 purple. Calyx hairy with finely pointed teeth. Petals free nearly to 

 the base. Legume not seen. 



Mozamb. Distr. Zambesi, Dr. Peters. 



1 do not know this plant, nor have I identified it amongst Dr. Kirk's collections. 

 Dr. Bolle puts it in Mr. Bentham's section Vulgares — Diacanthce. 



11. A. erubescens, Welw. mss. A small much -branched tree ; ex- 

 tremities obsoletely pubescent, pale cinnamon-brown. Infra-stipular 

 prickles short, sharply recurved. Leaf-rachis 1-1J in., slender, thinly 

 pubescent, with a sessile small gland below the lowest pinnae ; pinnae 

 in 4-5 pairs, leaflets 10-14-jugate, linear-oblong, obliquely broadly 

 pointed, glabrous, drying pale green, 2-3 lines long. Spikes axillary 

 on leafless branches, about 1-J in. long with the short peduncle, rather 

 dense. Flowers rose-white (grey-yellow when dry), sessile. Calyx 

 cupuliform, 5-fid, with ovate- or oblong-lanceolate teeth, clothed with 

 short dense grey tomentum. Petals united two-thirds their length, 

 rather longer than the calyx and similarly pubescent externally. Ovary 

 very shortly stipitate. Legume not seen. 



Lower Guinea. Bumbo, Angola, Dr. Weluritsch! 



Affords abundantly the best gum collected in this region (Dr. W.). 



12. A. ataxacantha, DC. ; Benth. in Hook. Journ. Bot. 1842, 511. 

 Shrub with long slender branches, puberulous or pubescent at first, 

 at length often glabrate. Prickles scattered, short, decurved, some- 

 times wanting. Leaf-rachis 3-6 in. long, with a raised or substipitate 

 gland near the base ; pinnae in 7-15 pairs, leaflets linear, subfalcate, 

 pointed or obtuse, 2 lines long more or less, in 20-40 pairs ; stipules 

 membranous, ovate-lanceolate, J-cordate at base, deciduous. Spikes 

 axillary, solitary or geminate, 2-3 in. long ; flowers rather dense, sub- 

 sessile, white. Calyx shortly toothed. Petals united nearly through- 

 out, twice as long as the calyx. " Legume 2- valved, broadly linear, 

 flat, chartaceous, glabrous." — Guill. et Perr. Fl. Seneg. i. 244. 



Upper Guinea. Senegambia, Heudelot ! Quorra, T. Vogdl Confluence of 

 Quorra and Tschada, Barter ! 



13. A. macrostachya, Beichenb. ; Benth. in Bond. Journ. Bot. 

 1842, 511. Extremities rusty tomentose-pubescent, with scattered 

 occasionally infra-stipular short recurved prickles. Leaf-rachis simi- 

 larly pubescent with a conspicuous oblong sessile gland near the base, 



